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https://engineering.purdue.edu/~ldc
WEB-BASED LOAD DURATION CURVE
Indrajeet ChaubeyPurdue University
Presented at the EPA Region 5 TMDL Practitioners WorkshopApril 20, 2008
https://engineering.purdue.edu/~ldc
Collaborators• Christine Urban – EPA Region 5
• Bernard Engel, James Hunter, Joseph Quansah, Larry Theller – Purdue University
• K.J. Lim – Kangwon National University
• Stacy Goodwin – IDEM
• Thomas Over - USGS
https://engineering.purdue.edu/~ldc
Flow Duration Curve (FDC)
Flow Duration Curve (Adapted from USEPA, 2007)
https://engineering.purdue.edu/~ldc
Flow Duration Curve (FDC)
Use: Flow patterns variability assessment in historic flow data
Flow Data Source: USGS, modeling, etc.
Analyzing FDC: Hydrologic condition indicator divisions for
FDC depends on the local hydrology and the water quality
issues:
• EPA (2007) recommends five hydrologic zones/categories –
High flows (0-10%)
Moist conditions (10-40%)
Mid-range flows (40-60%)
Dry conditions (60-90%)
Low flows (90-100%)
https://engineering.purdue.edu/~ldc
Load Duration Curve (LDC)
Use: To understand water quality concentration and load
variability for developing TMDLs
Water Quality Data: Federal, State and Educational
institutions, watershed practitioners, etc
Water Quality Standard: EPA, Local Stakeholders
LDC Development:
LDC = Stream flow *water quality target *conversion factor
https://engineering.purdue.edu/~ldc
Load Duration Curve (LDC)
Flow Duration Curve (USEPA, 2007)
In compliance
Out of compliance
https://engineering.purdue.edu/~ldc
Web-Based Flow Duration and Load Duration Curve Tool
https://engineering.purdue.edu/~ldc
1. Enter/Upload Flow Data for FDC
This option lets you enter your own flow data directly on the spreadsheet
This option lets you upload your own flow data from an existing file
https://engineering.purdue.edu/~ldc
1A. Enter Flow Data for FDC
You can type your ownDescription here
Date should be in yyyymmdd format
Flow unit can be either cms or cfs Clicking this
button will create the FDC
https://engineering.purdue.edu/~ldc
Flood Conditions
100 cfs
Flow Duration Curve (2002-2007) for USGS Gauge 04180000, Cedar Creek, IN
1A. Enter Flow Data for FDCFDC – Analysis
https://engineering.purdue.edu/~ldc
You can download the dataset byClicking on this button
You can click on the graph/image to save it on your computer
1A. Enter Flow Data for FDC
https://engineering.purdue.edu/~ldc
1B. Upload Flow Data for FDC
https://engineering.purdue.edu/~ldc
1B. Upload Flow Data for FDC
You can click on this button to seeExample data format
https://engineering.purdue.edu/~ldc
1B. Upload Flow Data for FDC
You can browse the file containingFlow data and then click on upload
https://engineering.purdue.edu/~ldc
Click this button to Generate FDC
1B. Upload Flow Data for FDC
Flow unit can be either cms or cfs
You can type your ownDescription here
https://engineering.purdue.edu/~ldc
Flood Conditions 100 cfs
Flow Duration Curve (2002-2007) for USGS Gauge 04180000, Cedar Creek, IN
1B. Upload Flow Data for FDCFDC – Analysis
https://engineering.purdue.edu/~ldc
3. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC 3
This option lets you use Google to select a USGS Gauge and directly upload flow data into the tool
This option lets you enter a USGS Gauge number to directly upload flow data into the tool
https://engineering.purdue.edu/~ldc
3A. Retrieve USGS Flow Data and /Upload WQ Data for LDC
You can click here to retrieve USGS flow data
https://engineering.purdue.edu/~ldc
3A. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC 3
Select beginning andEnding dates
Click this button to Generate FDC only
https://engineering.purdue.edu/~ldc
Flood Conditions100 cfs
Flow Duration Curve (2002-2007) for USGS Gauge 04180000, Cedar Creek, IN
3A. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC
FDC – Analysis
https://engineering.purdue.edu/~ldc
3B. Retrieve USGS Flow Data and /Upload WQ Data for LDC
You can enter USGS gauge number to retrieve flow data
Select beginning andEnding dates
Click this button to Generate FDC
https://engineering.purdue.edu/~ldc
Flood Conditions
100 cfs
Flow Duration Curve (2002-2007) for USGS Gauge 04180000, Cedar Creek, IN
3B. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC
FDC –Analysis
https://engineering.purdue.edu/~ldc
2. Enter / Upload Flow and WQ Data for LDC
This option lets you enter your own flow and WQ data directly on the spreadsheet
This option lets you upload your own flow and WQ data from an existing file
https://engineering.purdue.edu/~ldc
2A. Enter / Upload Flow and WQ Data for LDC
You can type your own description here
Date should be in yyyymmdd format
Flow unit can be either cms or cfs
Clicking this button will create the FDC and LDC
WQ unit can be ppm, ppb or count/100ml
You can type water quality pollutant name here
You can enter WQ standard or criteria value
https://engineering.purdue.edu/~ldc
Flood Conditions
100 cfs
Flow Duration Curve (2002-2007) for USGS Gauge 04180000, Cedar Creek, IN
FDC –Analysis
2. Enter / Upload Flow and WQ Data for LDC
https://engineering.purdue.edu/~ldc
LDC (2002-2007) for Ammonia at USGS Gauge 04180000, Cedar Creek, IN
FDC – Result Analysis2. Enter / Upload Flow and WQ Data for LDC
https://engineering.purdue.edu/~ldc
WQ Target (0.10 ppm)
Target Concentration Graph for Ammonia at USGS Gauge 04180000, Cedar Creek,
FDC – Result Analysis2. Enter / Upload Flow and WQ Data for LDC
https://engineering.purdue.edu/~ldc
You can download the dataset byClicking on this button
FDC – Result Analysis
2. Enter / Upload Flow and WQ Data for LDC
https://engineering.purdue.edu/~ldc
2B. Enter / Upload Flow and WQ Data for LDC
https://engineering.purdue.edu/~ldc
2B. Enter / Upload Flow and WQ Data for LDC
You can type your own Description here
Date should be in yyyymmdd format
Flow unit can be either cms or cfs
Clicking this button will create the FDC and LDC
WQ unit can be ppm, ppb or count/100ml
You can type water quality pollutant name here
You can enter WQ standard or criteria value
https://engineering.purdue.edu/~ldc
LDC (2002-2007) for Ammonia at USGS Gauge 04180000, Cedar Creek, IN
FDC – Result Analysis2. Enter / Upload Flow and WQ Data for LDC
https://engineering.purdue.edu/~ldc
WQ Target (0.10 ppm)
Target Concentration Graph for Ammonia at USGS Gauge 04180000, Cedar Creek,
FDC – Result Analysis2. Enter / Upload Flow and WQ Data for LDC
https://engineering.purdue.edu/~ldc
3. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC
This option lets you use Google to select a USGS Gauge and directly upload flow data into the tool
This option lets you enter a USGS Gauge number to directly upload flow data into the tool
https://engineering.purdue.edu/~ldc
3A. Retrieve USGS Flow Data and /Upload WQ Data for LDC
You can here to retrieve USGS flow data
https://engineering.purdue.edu/~ldc
3A. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC
Select beginning andEnding dates
Click this button to Generate LDC
Flow unit can be either cms or cfs
You can type your own Description here
You can enter WQ standard value
WQ unit can be ppm, ppb or count/100ml
You can type water quality pollutant name here
https://engineering.purdue.edu/~ldc
3A. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC
Select beginning andEnding dates
Click this button to Generate LDC
https://engineering.purdue.edu/~ldc
Flood Conditions
100 cfs
Flow Duration Curve (2002-2007) for USGS Gauge 04180000, Cedar Creek, IN
FDC –Analysis
3. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC
https://engineering.purdue.edu/~ldc
LDC (2002-2007) for Ammonia at USGS Gauge 04180000, Cedar Creek, IN
FDC – Result Analysis
3. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC
https://engineering.purdue.edu/~ldc
WQ Target (0.10 ppm)
Target Concentration Graph for Ammonia at USGS Gauge 04180000, Cedar Creek,
FDC – Result Analysis
3. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC
https://engineering.purdue.edu/~ldc
You can download the dataset byClicking on this button
FDC – Result Analysis
3. Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC
https://engineering.purdue.edu/~ldc
4. Using USGS Flow Data * Drainage Area Ratio and Entered /Uploaded WQ Data for LDC
This option lets you use Google to select a USGS Gauge and directly upload flow data into the tool
This option lets you enter a USGS Gauge number to directly upload flow data into the tool
Enter Watershed Area-Ratio
https://engineering.purdue.edu/~ldc
You can click here to retrieve USGS flow data
4. Using USGS Flow Data * Drainage Area Ratio and Entered /Uploaded WQ Data for LDC
https://engineering.purdue.edu/~ldc
Select beginning andEnding dates
Click this button to Generate LDC
Flow unit can be either cms or cfs
You can type your own Description here
You can enter WQ standard value
WQ unit can be ppm, ppb or count/100ml
You can type water quality pollutant name here
4. Using USGS Flow Data * Drainage Area Ratio and Entered /Uploaded WQ Data for LDC
https://engineering.purdue.edu/~ldc
FDC (2002-2007) for USGS Gauge 04180000, Cedar Creek, INwith Watershed Ratio of 0.75
4. Using USGS Flow Data * Drainage Area Ratio and Entered /Uploaded WQ Data for LDC
https://engineering.purdue.edu/~ldc
LDC for Ammonia at USGS Gauge 04180000, Cedar Creek, INwith Watershed Ratio of 0.75
4. Using USGS Flow Data * Drainage Area Ratio and Entered /Uploaded WQ Data for LDC
https://engineering.purdue.edu/~ldc
4. Using USGS Flow Data * Drainage Area Ratio and Entered /Uploaded WQ Data for LDC
WQ Target (0.10 ppm)
Target Concentration graph for Ammonia at USGS Gauge 04180000, Cedar Creek, IN with Watershed Ratio of 0.75
https://engineering.purdue.edu/~ldc
5. Enter Flow and WQ Data for LDC with Surface-runoff and Estimated Loads
Date should be in yyyymmdd format
Flow unit can be either cms or cfs
WQ unit can be ppm, ppb or count/100ml
You can type your own Description here
Select Aquifer Type
https://engineering.purdue.edu/~ldc
https://engineering.purdue.edu/~ldc
5. Enter Flow and WQ Data for LDC with Surface-runoff and Estimated Loads
https://engineering.purdue.edu/~ldc
5. Enter Flow and WQ Data for LDC with Surface-runoff and Estimated Loads
https://engineering.purdue.edu/~ldc
• Please visit the link below for most up to date information on FDC and LDC
https://engineering.purdue.edu/~ldc
https://engineering.purdue.edu/~ldc
Please visit the link below for most up to date information on FDC and LDC https://engineering.purdue.edu/~ldc